I used the following mysql query as workaround:
mysql use neutron update ml2_port_bindings set vif_type="unbound" where port_id="e5e3906b-24d8-4642-9876-2ac06f984809";
I used the following mysql query as workaround:
mysql "e5e3906b- 24d8-4642- 9876-2ac06f9848 09";
use neutron
update ml2_port_bindings set vif_type="unbound" where port_id=